Sofa



FIG. 1 is a front elevation view of the sofa;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is an opposite side elevation view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a front perspective view thereof.

FIG. 7 is a front perspective view thereof showing the sofa in a reclined position.

The dashed lines in the drawings are understood to represent stitching. The dot-dash lines are shown for illustration only and form no part of the claimed design. 

I claim the ornamental design for a sofa, as shown and described. 